Singer 9920 Service Manual page 32

Checking Starting point of Z and F pulse
motors
1. When self-diagnositic program is running;
• By pressing the button (a), Z pulse motor will move to
starting point.
• By pressing the button (b), F pulse motor will move to
starting point.
Z
Checking LED Light
1. When self-diagnositic program is running;
• By pressing the button (c) once, LED (d) will turn on.
• By pressing the button (c) again, LED (e) will turn on.
• By pressing the button (c) once more, LED will turn
off.
9940
1
d e
c
1 9940
a b
9920
a b
9910
a b
9920
1
d e
5
c
9910
1
d e
SERVICE MANUAL
F
c
32